Innovative Use of a Rov to Control Underwater Coastal Protections
- Thebaud Nicolas (VINCI Construction Terrassement) | Macaigne Vincent (ID OCEAN) | Le Bars Steven (ID OCEAN)
- Document ID
- Offshore Technology Conference
- Offshore Technology Conference, 4-7 May, Houston, Texas, USA
- Publication Date
- Document Type
- Conference Paper
- 2020. Offshore Technology Conference
- Dike, Coastal protection, ROV, Concrete armour units, Control
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- 46 since 2007
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The control of monolayer concrete armour units on coastal protection breakwaters can be time and cost consuming, especially underwater. It is even more the case when - for maintenance and control purpose - they are conducted long after the completion of the construction (positioning issues, number of units to control, etc). However, this occurs frequently on construction projects which last for several years, or during the operation and maintenance of such structures. On top of that, the complexity of this type of projects - usually coastal constructions such a dike easily exceeds 6000 units/km - requires precision and productivity for the control inspections.
As a result, specific control solutions have been developped on the NRL project to inspect and monitor the breakwater after its construction.
The NRL project lies in La Reunion (Indian Ocean). It is due to replace the current coastal road, which was built at the foot of a 100m height cliff. Indeed, after heavy rainfalls, rocks are falling from the cliff. The road is also usually closed during storms as the road is submerged by the sea on one side, and by rainfalls on the cliff side.
The objective of the project is to build a new road at sea to secure this vital economical axis between the cities of Saint-Denis - the island capital - and La Possession.
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https://www.youtube.com/watch?v=XVnwdQXPQHA – SEABIM – georeferenced subsea video inspection by optical sensor
https://www.youtube.com/watch?v=UrI9rMjVqAY - georeferenced subsea video inspection by acoustic sensor
https://www.youtube.com/watch?v=bxJICeVWSNI&feature=youtu.be – SEABIM – 3D breakwater reconstruction from subsea video